Speed in Gears

Discussion in 'Performance Mods' started by Silverback, May 18, 2006.

  1. Leveil22

    Leveil22 Full Access Member

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    Ok thanks
     
  2. arnie_82

    arnie_82 Full Access Member

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    If you want 4:10 we could swap.
     
  3. Leveil22

    Leveil22 Full Access Member

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    whats needed to run a 3.73 and who sells them?
     
  4. SergioL.

    SergioL. Full Access Member

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    I just got an '04 and it turns 2,000 rpm @ 80mph with stock size tires.

    Does this mean a previous owner swapped to 4;56's?
     
  5. Psycho Mythic

    Psycho Mythic Full Access Member

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    4.10 gears @ 80mph = just over 1600rpm in 6th gear...seems you're a couple hundred rpm off bud

    4.10 gears @ 75mph = 1500rpm in 6th gear...

    My truck has stock size tires (305-40R22's)

    [​IMG]

    [​IMG]
     
    Last edited: Dec 5, 2012
  6. mysrt10

    mysrt10 Been there, done that Supporting Member

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    I was out today and I got 1950 rpm @ 80 mph. I was going to post on your thread for yor info.
     
  7. VENOMOUS1 RACING

    VENOMOUS1 RACING Has Left the Room - Banned from VTCOA!

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    Make sure you take tire diameter into consideration!! 45 series will throw off calculations. Also someone with new tires versus old tires. Does make a slight difference. Ill see what mine says. I have 45s out back and 40s up front.
     
  8. Psycho Mythic

    Psycho Mythic Full Access Member

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    Im running stock 305-40R22's
     
  9. ViperJeff

    ViperJeff Well-Known Member Administrator Supporting Member

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    This would make John laugh
     
  10. stealth78

    stealth78 Full Access Member

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    You're kinda right... If you are getting your mph reading off of a GPS, then yes it will throw it off. Although if you are running 45's, you will be going faster but your speedometer will not know the difference.
     
  11. caveman

    caveman Well-Known Member Supporting Member

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    A GPS will show the correct MPH regardless of tire size. The speedometer will read differently with a change in tire size.

    Ya'll do realize that calculating RPM, speed, gear ratio, flux capacitor readings, etc, is as simple as using a basic calculator (click here for an example), right?
     
    Last edited: Dec 24, 2012
  12. SrtBrad

    SrtBrad Michel Productions

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    way to tell him 6 years later hahahahah
     
  13. caveman

    caveman Well-Known Member Supporting Member

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    Threads on the VTCoA never die, they just fade away until somebody bumps them. :D
     
  14. SrtBrad

    SrtBrad Michel Productions

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    everyway i do the math on your truck cody it says it has 3.73 for a rear end
     
  15. caveman

    caveman Well-Known Member Supporting Member

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    Me too, Cody. Check your RPM in 4th gear for a couple different speeds and I bet the numbers work out for a 4.10 though.
     
    Last edited: Dec 24, 2012
  16. SrtBrad

    SrtBrad Michel Productions

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    my loaded tire radius might be off as well
     
  17. caveman

    caveman Well-Known Member Supporting Member

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    If it's within in inch, that should get us close.
     
  18. SrtBrad

    SrtBrad Michel Productions

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    How many times have you told me that haha
     
  19. stealth78

    stealth78 Full Access Member

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    Lol. Sorry bud I knew what I meant just may not have sounded right. YES, your GPS will read true. But what I meant by your speedometer not knowing the difference is... if you have 40 or 45 series tires your speedometer "for say" will read 120 @ 6000rpm, yet with 45 series you will actually be traveling faster. I realize you know this, I just had to post this to reassure myself that I'm not quite as dumb as I made myself sound! MERRY CHRISTMAS GUYS!!! Thanks for all the helpful info and entertaining threads on my first year with the VTCOA!!!
     
  20. caveman

    caveman Well-Known Member Supporting Member

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    First off: Merry Christmas, Everyone!


    I haven't told you that since yesterday, Lil Guy :D


    Gotcha.
     
    Last edited: Dec 25, 2012